William kearney



(No Model.)

W; KEARNEY;

FURNACE DOOR.

No. 374,190 Paten'ted Dec. 6,1887.

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WILLIAM KEARNEY, OF BELLEVILLE, NEW JERSEY.

FURNACE-DOOR.

SPECIFICATION forming part of Letters Patent No. 374,190, dated December6, 1887.

Application filed March 25, 1887. Serial No. 232,353.

To all whom it may concern.-

Be it known that 1, WILLIAM KEARNEY, a citizen of the United States,residingat Belleville, Essex county, New Jersey, haveinvented certainnew and useful Improvements in Furnace-Doors, fully described andrepresented in the following specification and the accompanyingdrawings, forming a part of the same.

The object of this invention is to furnish a furnace-door that shall besimple in form, easily constructed, and adapted to stand long exposureto the heat without being distorted.

The construction consists in an air-box cast separately and fixed to theinner side of the door and a vertical partition within the airbox todeflect the air upward. Holes are formed in the door near the bottom ofthe partition and in the inner side of the airbox near the bottom, andthe face of the air-box next to the fire is concaved toward the door, tocompensate for the expansion induced by the heat, and which commonlybulges such exposed plate toward the fire.

In the annexed drawings, Figure l is an outside View of a furnace-doorembodying my invention, showing apart of the door-frame in connectiontherewith. Fig. 2 is aninside view of the same without the frame; Fig.3, a ver tical section of the same through Fig. 1; Fig. 4, an elevationfrom within the air-box of the door-plate, and Fig. 5 an inside View ofthe air-box.

a is the door plate; b, three ribs attached to its inner face, one beinghorizontal and the other two vertical at their ends.

0 is the air-box plate, and d are flanges projecting from the edges ofthe same and fitted around the ribs 1) upon the door-plate.

e are ledges on the inner faces of the air-box plate.

The air-box is divided bya partition, f, held between the ribs b and theledges 0. Holes 9 are formed in the door near the bottom of thepartition and holes h in the inner side of the air-box near the bottom,and the inner plate, 0, or face of the air-box next to the fire isconcaved toward the door to compensate for the expansion induced by theheat, and which commonly bulges such exposed plates toward the fire. Theair entering the holes 9 is de fiected upward by the partition f, and,passing over the top of the same, moves downward (No model in contactwith the concave plate 0, thus cooling the entire surface of the latterin the de sired manner. The air then enters the furnace through theholes h, being discharged, by thelocation of the holes, close to thesurface of the heated fuel, thus driving the heated gases away from theplate while promoting the combustion. Both plates are provided withboltholes i and bolts j, inserted within the same to clamp themtogether.

it is the door-frame, and Zare the hinges of the door.

By reference to the drawings it will be noticed that the number of theholes hin the airbox plate exceeds that ofthe holes 9 in the doorplate,while their united area is less. The heating of the air within theair-box thus generates a considerable velocity of exit from the holes h,which operates to cool the door, in the manner described.

I am aware that various constructions have been devised for coolingfurnace-doors, and that it is not new to form a tortuous passage uponthe inner side of a door, and to conduct air froin'holes in the doorthrough such passage to the furnace; and I do not therefore claim,broadly, the combination of a furnacedoor with ventillating means, butonly the construction herein shown and described.

By my particular construction the casting and connection of the severalparts are greatly facilitated, and by the curvature of the inner plate,0, the metallic surface exposed to thefire is in practice entirelyprevented from bulging outward.

The door is provided with a tubularhandlc, n, which may be made ofordinary wrought. iron pipe, projecting cars at being formed upon thedoor to sustain the ends of the pipe in a vertical position, sothat adraft of air may constantly rise through the same to keep it cool. Thisconstruction operates most effectively to keep the handle at acomparativelylow temperature.

By the use of the cooling device applied to the inner side of the doorand the means for cooling the handle just described I am enabled tograsp the handle by the fingers without the use of a hook or poker, asis commonly required.

Having thus set forth my invention, what I claim herein is- 1. In afurnace-door, the combination, with the door-plate a, of the horizontaland vertical ribs 1), formed integral therewith, the air-box havingcurved plate 0, flanges d upon all its edges, and the Vertical andhorizontal ledges e, and the partition f, clamped between the ribs 1)and ledges e, and extending from the bottom of the air-box nearly to thetop, and the door being provided with the holes 9, near the horizontalrib b, and the plate 0 being provided near its bottom with the holes h,all arranged and operated as and for the purpose set forth.

2. In a furnacedoor, the combination, with the door-plate a, of thehorizontal and vertical ribs b, formed integral therewith, the air-boxhaving curved plate 0, flanges 66 upon all its edges, and the verticaland horizontal ledges e, and the partition f, clamped between the ribs band ledges e, and extending from the bottom of the air-box nearly to thetop, and the door being provided with the holes g near the horizontalrib b, and the plate a being provided near its bottom with holes'h,greater in number and less in area than the holes 9, as and for thepurpose set forth.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

WVILLIAM KEARNEY.

Witnesses:

L. LEE, HENRY J. MILLER.

